Mercurial > hg > nginx-site
comparison xml/en/docs/http/ngx_http_core_module.xml @ 106:56457a474903
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author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 19 Oct 2011 10:39:49 +0000 |
parents | c76a257f3fd4 |
children | 72524ae53106 |
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105:1aa4f50144e4 | 106:56457a474903 |
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64 </note> | 64 </note> |
65 </para> | 65 </para> |
66 | 66 |
67 <para> | 67 <para> |
68 For AIO to work, | 68 For AIO to work, |
69 <link id="sendfile">sendfile</link> | 69 <link id="sendfile"/> |
70 needs to be disabled: | 70 needs to be disabled: |
71 <example> | 71 <example> |
72 location /video/ { | 72 location /video/ { |
73 sendfile off; | 73 sendfile off; |
74 aio on; | 74 aio on; |
92 block on disk I/O and instead report back when the data are not in | 92 block on disk I/O and instead report back when the data are not in |
93 memory; nginx then initiates an asynchronous data load by reading | 93 memory; nginx then initiates an asynchronous data load by reading |
94 one byte. The FreeBSD kernel then loads the first 128K bytes | 94 one byte. The FreeBSD kernel then loads the first 128K bytes |
95 of a file into memory, however next reads will only load data | 95 of a file into memory, however next reads will only load data |
96 in 16K chunks. This can be tuned using the | 96 in 16K chunks. This can be tuned using the |
97 <link id="read_ahead">read_ahead</link> | 97 <link id="read_ahead"/> |
98 directive. | 98 directive. |
99 </para> | 99 </para> |
100 | 100 |
101 <para> | 101 <para> |
102 On Linux, AIO is usable starting from kernel version 2.6.22; | 102 On Linux, AIO is usable starting from kernel version 2.6.22; |
103 plus, it is also necessary to enable | 103 plus, it is also necessary to enable |
104 <link id="directio">directio</link>, | 104 <link id="directio"/>, |
105 otherwise reading will be blocking: | 105 otherwise reading will be blocking: |
106 <example> | 106 <example> |
107 location /video/ { | 107 location /video/ { |
108 aio on; | 108 aio on; |
109 directio 512; | 109 directio 512; |
112 </example> | 112 </example> |
113 </para> | 113 </para> |
114 | 114 |
115 <para> | 115 <para> |
116 On Linux, | 116 On Linux, |
117 <link id="directio">directio</link> | 117 <link id="directio"/> |
118 can only be used for reading blocks that are aligned on 512-byte | 118 can only be used for reading blocks that are aligned on 512-byte |
119 boundaries (or 4K for XFS). | 119 boundaries (or 4K for XFS). |
120 Reading of unaligned file's end is still made in blocking mode. | 120 Reading of unaligned file's end is still made in blocking mode. |
121 The same holds true for byte range requests, and for FLV requests | 121 The same holds true for byte range requests, and for FLV requests |
122 not from the beginning of a file: reading of unaligned data at the | 122 not from the beginning of a file: reading of unaligned data at the |
123 beginning and end of a file will be blocking. | 123 beginning and end of a file will be blocking. |
124 There is no need to turn off | 124 There is no need to turn off |
125 <link id="sendfile">sendfile</link> | 125 <link id="sendfile"/> |
126 explicitly as it is turned off automatically when | 126 explicitly as it is turned off automatically when |
127 <link id="directio">directio</link> | 127 <link id="directio"/> |
128 is used. | 128 is used. |
129 </para> | 129 </para> |
130 | 130 |
131 </directive> | 131 </directive> |
132 | 132 |
173 location /images/ { | 173 location /images/ { |
174 alias /data/w3/images/; | 174 alias /data/w3/images/; |
175 } | 175 } |
176 </example> | 176 </example> |
177 it is better to use the | 177 it is better to use the |
178 <link id="root">root</link> | 178 <link id="root"/> |
179 directive instead: | 179 directive instead: |
180 <example> | 180 <example> |
181 location /images/ { | 181 location /images/ { |
182 root /data/w3; | 182 root /data/w3; |
183 } | 183 } |
322 For most requests, a buffer of 1K bytes is enough. | 322 For most requests, a buffer of 1K bytes is enough. |
323 However, if a request includes long cookies, or comes from a WAP client, | 323 However, if a request includes long cookies, or comes from a WAP client, |
324 it may not fit into 1K. | 324 it may not fit into 1K. |
325 If a request line, or a request header field do not fit entirely into | 325 If a request line, or a request header field do not fit entirely into |
326 this buffer then larger buffers are allocated, configured by the | 326 this buffer then larger buffers are allocated, configured by the |
327 <link id="large_client_header_buffers">large_client_header_buffers</link> | 327 <link id="large_client_header_buffers"/> |
328 directive. | 328 directive. |
329 </para> | 329 </para> |
330 | 330 |
331 </directive> | 331 </directive> |
332 | 332 |
380 <context>server</context> | 380 <context>server</context> |
381 <context>location</context> | 381 <context>location</context> |
382 | 382 |
383 <para> | 383 <para> |
384 Defines a default MIME-type of a response. | 384 Defines a default MIME-type of a response. |
385 See also the <link id="types">types</link> directive. | 385 See also the <link id="types"/> directive. |
386 </para> | 386 </para> |
387 | 387 |
388 </directive> | 388 </directive> |
389 | 389 |
390 | 390 |
400 the <c-def>O_DIRECT</c-def> flag (FreeBSD, Linux), | 400 the <c-def>O_DIRECT</c-def> flag (FreeBSD, Linux), |
401 the <c-def>F_NOCACHE</c-def> flag (Mac OS X), | 401 the <c-def>F_NOCACHE</c-def> flag (Mac OS X), |
402 or the <c-func>directio</c-func> function (Solaris), | 402 or the <c-func>directio</c-func> function (Solaris), |
403 when reading files that are larger than the specified <argument>size</argument>. | 403 when reading files that are larger than the specified <argument>size</argument>. |
404 It automatically disables (0.7.15) the use of | 404 It automatically disables (0.7.15) the use of |
405 <link id="sendfile">sendfile</link> | 405 <link id="sendfile"/> |
406 for a given request. | 406 for a given request. |
407 It could be useful for serving large files: | 407 It could be useful for serving large files: |
408 <example> | 408 <example> |
409 directio 4m; | 409 directio 4m; |
410 </example> | 410 </example> |
411 or when using <link id="aio">aio</link> on Linux. | 411 or when using <link id="aio"/> on Linux. |
412 </para> | 412 </para> |
413 | 413 |
414 </directive> | 414 </directive> |
415 | 415 |
416 | 416 |
421 <context>server</context> | 421 <context>server</context> |
422 <context>location</context> | 422 <context>location</context> |
423 | 423 |
424 <para> | 424 <para> |
425 Sets an alignment for | 425 Sets an alignment for |
426 <link id="directio">directio</link>. | 426 <link id="directio"/>. |
427 In most cases, a 512-byte alignment is enough, however, when | 427 In most cases, a 512-byte alignment is enough, however, when |
428 using XFS under Linux, it needs to be increased to 4K. | 428 using XFS under Linux, it needs to be increased to 4K. |
429 </para> | 429 </para> |
430 | 430 |
431 </directive> | 431 </directive> |
551 Internal requests are the following: | 551 Internal requests are the following: |
552 | 552 |
553 <list type="bullet"> | 553 <list type="bullet"> |
554 | 554 |
555 <listitem> | 555 <listitem> |
556 requests redirected by the <link id="error_page">error_page</link> directive; | 556 requests redirected by the <link id="error_page"/> directive; |
557 </listitem> | 557 </listitem> |
558 | 558 |
559 <listitem> | 559 <listitem> |
560 subrequests formed by the | 560 subrequests formed by the |
561 <command>include virtual</command> | 561 <command>include virtual</command> |
563 <link doc="ngx_http_ssi_module.xml">ngx_http_ssi_module</link>; | 563 <link doc="ngx_http_ssi_module.xml">ngx_http_ssi_module</link>; |
564 </listitem> | 564 </listitem> |
565 | 565 |
566 <listitem> | 566 <listitem> |
567 requests changed by the | 567 requests changed by the |
568 <link doc="ngx_http_rewrite_module.xml" id="rewrite">rewrite</link> | 568 <link doc="ngx_http_rewrite_module.xml" id="rewrite"/> |
569 directive of the module | 569 directive of the module |
570 <link doc="ngx_http_rewrite_module.xml">ngx_http_rewrite_module</link>. | 570 <link doc="ngx_http_rewrite_module.xml">ngx_http_rewrite_module</link>. |
571 </listitem> | 571 </listitem> |
572 | 572 |
573 </list> | 573 </list> |
720 </para> | 720 </para> |
721 | 721 |
722 <para> | 722 <para> |
723 This directive is not applicable if one wants to rate limit | 723 This directive is not applicable if one wants to rate limit |
724 a group of clients on the | 724 a group of clients on the |
725 <link id="server">server</link> | 725 <link id="server"/> |
726 level. | 726 level. |
727 If that is the case, the desired limit can be specified in the | 727 If that is the case, the desired limit can be specified in the |
728 <var>$limit_rate</var> | 728 <var>$limit_rate</var> |
729 variable: | 729 variable: |
730 <example> | 730 <example> |
1102 <context>server</context> | 1102 <context>server</context> |
1103 <context>location</context> | 1103 <context>location</context> |
1104 | 1104 |
1105 <para> | 1105 <para> |
1106 Enables or disables logging of errors about not found files into the | 1106 Enables or disables logging of errors about not found files into the |
1107 <link doc="../ngx_core_module.xml" id="error_log">error_log</link>. | 1107 <link doc="../ngx_core_module.xml" id="error_log"/>. |
1108 </para> | 1108 </para> |
1109 | 1109 |
1110 </directive> | 1110 </directive> |
1111 | 1111 |
1112 | 1112 |
1117 <context>server</context> | 1117 <context>server</context> |
1118 <context>location</context> | 1118 <context>location</context> |
1119 | 1119 |
1120 <para> | 1120 <para> |
1121 Enables or disables logging of subrequests into the | 1121 Enables or disables logging of subrequests into the |
1122 <link doc="ngx_http_log_module.xml" id="access_log">access_log</link>. | 1122 <link doc="ngx_http_log_module.xml" id="access_log"/>. |
1123 </para> | 1123 </para> |
1124 | 1124 |
1125 </directive> | 1125 </directive> |
1126 | 1126 |
1127 | 1127 |
1156 the compression. | 1156 the compression. |
1157 </para> | 1157 </para> |
1158 | 1158 |
1159 <para> | 1159 <para> |
1160 If a directive is specified on the | 1160 If a directive is specified on the |
1161 <link id="server">server</link> | 1161 <link id="server"/> |
1162 level, which is also a default server, its value will cover | 1162 level, which is also a default server, its value will cover |
1163 all virtual servers listening on the same address and port. | 1163 all virtual servers listening on the same address and port. |
1164 </para> | 1164 </para> |
1165 | 1165 |
1166 </directive> | 1166 </directive> |
1220 | 1220 |
1221 <listitem> | 1221 <listitem> |
1222 file lookup errors, such as “file not found”, “no read permission”, | 1222 file lookup errors, such as “file not found”, “no read permission”, |
1223 and so on. | 1223 and so on. |
1224 Caching of errors should be enabled separately by the | 1224 Caching of errors should be enabled separately by the |
1225 <link id="open_file_cache_errors">open_file_cache_errors</link> | 1225 <link id="open_file_cache_errors"/> |
1226 directive. | 1226 directive. |
1227 </listitem> | 1227 </listitem> |
1228 | 1228 |
1229 </list> | 1229 </list> |
1230 </para> | 1230 </para> |
1283 <context>server</context> | 1283 <context>server</context> |
1284 <context>location</context> | 1284 <context>location</context> |
1285 | 1285 |
1286 <para> | 1286 <para> |
1287 Enables or disables caching of file lookup errors by | 1287 Enables or disables caching of file lookup errors by |
1288 <link id="open_file_cache">open_file_cache</link>. | 1288 <link id="open_file_cache"/>. |
1289 </para> | 1289 </para> |
1290 | 1290 |
1291 </directive> | 1291 </directive> |
1292 | 1292 |
1293 | 1293 |
1300 <context>server</context> | 1300 <context>server</context> |
1301 <context>location</context> | 1301 <context>location</context> |
1302 | 1302 |
1303 <para> | 1303 <para> |
1304 Enables to use kernel events to validate | 1304 Enables to use kernel events to validate |
1305 <link id="open_file_cache">open_file_cache</link> | 1305 <link id="open_file_cache"/> |
1306 elements. | 1306 elements. |
1307 This directive works with the | 1307 This directive works with the |
1308 <link doc="../events.xml" id="kqueue">kqueue</link> | 1308 <link doc="../events.xml" id="kqueue"/> |
1309 method only. | 1309 method only. |
1310 Note that only NetBSD 2.0+ and FreeBSD 6.0+ | 1310 Note that only NetBSD 2.0+ and FreeBSD 6.0+ |
1311 support events for arbitrary file system types. | 1311 support events for arbitrary file system types. |
1312 Other operating systems support events only for essential | 1312 Other operating systems support events only for essential |
1313 file systems such as UFS or FFS. | 1313 file systems such as UFS or FFS. |
1326 <context>location</context> | 1326 <context>location</context> |
1327 | 1327 |
1328 <para> | 1328 <para> |
1329 Sets the minimum <argument>number</argument> of file accesses during | 1329 Sets the minimum <argument>number</argument> of file accesses during |
1330 the period configured by the <parameter>inactive</parameter> parameter | 1330 the period configured by the <parameter>inactive</parameter> parameter |
1331 of the <link id="open_file_cache">open_file_cache</link> directive, | 1331 of the <link id="open_file_cache"/> directive, |
1332 after which a file descriptor will remain open in the cache. | 1332 after which a file descriptor will remain open in the cache. |
1333 </para> | 1333 </para> |
1334 | 1334 |
1335 </directive> | 1335 </directive> |
1336 | 1336 |
1342 <context>server</context> | 1342 <context>server</context> |
1343 <context>location</context> | 1343 <context>location</context> |
1344 | 1344 |
1345 <para> | 1345 <para> |
1346 Sets a time after which | 1346 Sets a time after which |
1347 <link id="open_file_cache">open_file_cache</link> | 1347 <link id="open_file_cache"/> |
1348 elements should be validated. | 1348 elements should be validated. |
1349 <!-- | 1349 <!-- |
1350 When | 1350 When |
1351 <link id="open_file_cache_events">open_file_cache_events</link> | 1351 <link id="open_file_cache_events"/> |
1352 is enabled, open file descriptors | 1352 is enabled, open file descriptors |
1353 are checked only once, and then updated right after they get changed. | 1353 are checked only once, and then updated right after they get changed. |
1354 --> | 1354 --> |
1355 </para> | 1355 </para> |
1356 | 1356 |
1363 <context>http</context> | 1363 <context>http</context> |
1364 <context>server</context> | 1364 <context>server</context> |
1365 | 1365 |
1366 <para> | 1366 <para> |
1367 This directive is made obsolete by the | 1367 This directive is made obsolete by the |
1368 <link id="server_name_in_redirect">server_name_in_redirect</link> directive. | 1368 <link id="server_name_in_redirect"/> directive. |
1369 </para> | 1369 </para> |
1370 | 1370 |
1371 <!-- | 1371 <!-- |
1372 <para> | 1372 <para> |
1373 Enables or disables optimization of hostname checking in name-based | 1373 Enables or disables optimization of hostname checking in name-based |
1434 <context>server</context> | 1434 <context>server</context> |
1435 <context>location</context> | 1435 <context>location</context> |
1436 | 1436 |
1437 <para> | 1437 <para> |
1438 Enables or disables doing several redirects using the | 1438 Enables or disables doing several redirects using the |
1439 <link id="error_page">error_page</link> | 1439 <link id="error_page"/> |
1440 directive. | 1440 directive. |
1441 </para> | 1441 </para> |
1442 | 1442 |
1443 </directive> | 1443 </directive> |
1444 | 1444 |
1534 | 1534 |
1535 <para> | 1535 <para> |
1536 A path to the file is constructed by merely adding a URI to the value | 1536 A path to the file is constructed by merely adding a URI to the value |
1537 of the <code>root</code> directive. | 1537 of the <code>root</code> directive. |
1538 If a URI need to be modified, the | 1538 If a URI need to be modified, the |
1539 <link id="alias">alias</link> directive should be used. | 1539 <link id="alias"/> directive should be used. |
1540 </para> | 1540 </para> |
1541 | 1541 |
1542 </directive> | 1542 </directive> |
1543 | 1543 |
1544 | 1544 |
1628 <para> | 1628 <para> |
1629 Sets a configuration for the virtual server. | 1629 Sets a configuration for the virtual server. |
1630 There is no clean separation between IP-based (based on the IP address) | 1630 There is no clean separation between IP-based (based on the IP address) |
1631 and name-based (based on the <header>Host</header> request header field) | 1631 and name-based (based on the <header>Host</header> request header field) |
1632 virtual servers. | 1632 virtual servers. |
1633 Instead, the <link id="listen">listen</link> directives describe all | 1633 Instead, the <link id="listen"/> directives describe all |
1634 addresses and ports that should accept connections for a server, and the | 1634 addresses and ports that should accept connections for a server, and the |
1635 <link id="server_name">server_name</link> directive lists all server names. | 1635 <link id="server_name"/> directive lists all server names. |
1636 An example configuration is provided in the | 1636 An example configuration is provided in the |
1637 <link doc="../virtual_hosts.xml"> | 1637 <link doc="../virtual_hosts.xml"> |
1638 Setting Up Virtual Servers</link> document. | 1638 Setting Up Virtual Servers</link> document. |
1639 </para> | 1639 </para> |
1640 | 1640 |
1782 <context>server</context> | 1782 <context>server</context> |
1783 <context>location</context> | 1783 <context>location</context> |
1784 | 1784 |
1785 <para> | 1785 <para> |
1786 Enables or disables the use of the primary server name, specified by the | 1786 Enables or disables the use of the primary server name, specified by the |
1787 <link id="server_name">server_name</link> | 1787 <link id="server_name"/> |
1788 directive, in redirects issued by nginx. | 1788 directive, in redirects issued by nginx. |
1789 When disabled, the name from the <header>Host</header> request header field | 1789 When disabled, the name from the <header>Host</header> request header field |
1790 is used. | 1790 is used. |
1791 If this field is not present, an IP address of the server is used. | 1791 If this field is not present, an IP address of the server is used. |
1792 </para> | 1792 </para> |
1863 | 1863 |
1864 <para> | 1864 <para> |
1865 Enables or disables the use of | 1865 Enables or disables the use of |
1866 the <c-def>TCP_NOPUSH</c-def> socket option on FreeBSD | 1866 the <c-def>TCP_NOPUSH</c-def> socket option on FreeBSD |
1867 or the <c-def>TCP_CORK</c-def> socket option on Linux. | 1867 or the <c-def>TCP_CORK</c-def> socket option on Linux. |
1868 Options are enabled only when <link id="sendfile">sendfile</link> is used. | 1868 Options are enabled only when <link id="sendfile"/> is used. |
1869 Enabling the option allows to | 1869 Enabling the option allows to |
1870 <list type="bullet"> | 1870 <list type="bullet"> |
1871 | 1871 |
1872 <listitem> | 1872 <listitem> |
1873 send the response header and the beginning of a file in one packet, | 1873 send the response header and the beginning of a file in one packet, |
2174 the <argument>name</argument> cookie | 2174 the <argument>name</argument> cookie |
2175 </tag-desc> | 2175 </tag-desc> |
2176 | 2176 |
2177 <tag-name><var>$document_root</var></tag-name> | 2177 <tag-name><var>$document_root</var></tag-name> |
2178 <tag-desc> | 2178 <tag-desc> |
2179 <link id="root">root</link> directive's value for the current request | 2179 <link id="root"/> directive's value for the current request |
2180 </tag-desc> | 2180 </tag-desc> |
2181 | 2181 |
2182 <tag-name><var>$document_uri</var></tag-name> | 2182 <tag-name><var>$document_uri</var></tag-name> |
2183 <tag-desc> | 2183 <tag-desc> |
2184 same as <var>$uri</var> | 2184 same as <var>$uri</var> |
2226 same as <var>$args</var> | 2226 same as <var>$args</var> |
2227 </tag-desc> | 2227 </tag-desc> |
2228 | 2228 |
2229 <tag-name><var>$realpath_root</var></tag-name> | 2229 <tag-name><var>$realpath_root</var></tag-name> |
2230 <tag-desc> | 2230 <tag-desc> |
2231 <link id="root">root</link> directive's value | 2231 <link id="root"/> directive's value |
2232 for the current request, with all symbolic links resolved to real paths | 2232 for the current request, with all symbolic links resolved to real paths |
2233 </tag-desc> | 2233 </tag-desc> |
2234 | 2234 |
2235 <tag-name><var>$remote_addr</var></tag-name> | 2235 <tag-name><var>$remote_addr</var></tag-name> |
2236 <tag-desc> | 2236 <tag-desc> |
2256 <tag-desc> | 2256 <tag-desc> |
2257 request body | 2257 request body |
2258 <para> | 2258 <para> |
2259 The variable's value is made available in locations | 2259 The variable's value is made available in locations |
2260 processed by the | 2260 processed by the |
2261 <link doc="ngx_http_proxy_module.xml" id="proxy_pass">proxy_pass</link> | 2261 <link doc="ngx_http_proxy_module.xml" id="proxy_pass"/> |
2262 and | 2262 and |
2263 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass">fastcgi_pass</link> | 2263 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass"/> |
2264 directives. | 2264 directives. |
2265 </para> | 2265 </para> |
2266 </tag-desc> | 2266 </tag-desc> |
2267 | 2267 |
2268 <tag-name><var>$request_body_file</var></tag-name> | 2268 <tag-name><var>$request_body_file</var></tag-name> |
2274 <link id="client_body_in_file_only">client_body_in_file_only on</link> | 2274 <link id="client_body_in_file_only">client_body_in_file_only on</link> |
2275 needs be specified. | 2275 needs be specified. |
2276 When passing the name of a temporary file in a proxied request, | 2276 When passing the name of a temporary file in a proxied request, |
2277 or in a request to a FastCGI server, | 2277 or in a request to a FastCGI server, |
2278 passing of the request body should be disabled by the | 2278 passing of the request body should be disabled by the |
2279 <link doc="ngx_http_proxy_module.xml" | 2279 <link doc="ngx_http_proxy_module.xml" id="proxy_pass_request_body"/> |
2280 id="proxy_pass_request_body">proxy_pass_request_body</link> | |
2281 and | 2280 and |
2282 <link doc="ngx_http_fastcgi_module.xml" | 2281 <link doc="ngx_http_fastcgi_module.xml" id="fastcgi_pass_request_body"/> |
2283 id="fastcgi_pass_request_body">fastcgi_pass_request_body</link> | |
2284 directives, respectively. | 2282 directives, respectively. |
2285 </para> | 2283 </para> |
2286 </tag-desc> | 2284 </tag-desc> |
2287 | 2285 |
2288 <tag-name><var>$request_completion</var></tag-name> | 2286 <tag-name><var>$request_completion</var></tag-name> |
2292 </tag-desc> | 2290 </tag-desc> |
2293 | 2291 |
2294 <tag-name><var>$request_filename</var></tag-name> | 2292 <tag-name><var>$request_filename</var></tag-name> |
2295 <tag-desc> | 2293 <tag-desc> |
2296 file path for the current query, based on the | 2294 file path for the current query, based on the |
2297 <link id="root">root</link> and <link id="alias">alias</link> | 2295 <link id="root"/> and <link id="alias"/> |
2298 directives, and the request URI | 2296 directives, and the request URI |
2299 </tag-desc> | 2297 </tag-desc> |
2300 | 2298 |
2301 <tag-name><var>$request_method</var></tag-name> | 2299 <tag-name><var>$request_method</var></tag-name> |
2302 <tag-desc> | 2300 <tag-desc> |
2322 <tag-name><var>$server_addr</var></tag-name> | 2320 <tag-name><var>$server_addr</var></tag-name> |
2323 <tag-desc> | 2321 <tag-desc> |
2324 an address of the server which accepted a request | 2322 an address of the server which accepted a request |
2325 <para> | 2323 <para> |
2326 Computing a value of this variable usually requires one system call. | 2324 Computing a value of this variable usually requires one system call. |
2327 To avoid a system call, the <link id="listen">listen</link> directives | 2325 To avoid a system call, the <link id="listen"/> directives |
2328 must specify addresses and use the <parameter>bind</parameter> parameter | 2326 must specify addresses and use the <parameter>bind</parameter> parameter |
2329 </para> | 2327 </para> |
2330 </tag-desc> | 2328 </tag-desc> |
2331 | 2329 |
2332 <tag-name><var>$server_name</var></tag-name> | 2330 <tag-name><var>$server_name</var></tag-name> |